Siemens 6AV3688-3ED13-0AX0 PP17-II Push Button Panel with PROFIBUS DP12

Description The 6AV3688-3ED13-0AX0 is a Siemens SIMATIC PP17-II Push Button Panel, purpose-built as a decentralized, rugged operator interface for machinery and process control applications where a full touchscreen HMI is unnecessary but physical controls and local I/O are essential. Manufactured by Siemens (Germany) and belonging to the SIMATIC HMI accessory family, this panel combines 32 short-stroke pushbuttons, 32 surface-mounted LEDs, and integrated 16 digital input / 16 digital output terminals into a single PROFIBUS DP12-connected device. It communicates natively with SIMATIC S7-1200, S7-1500, S7-300/400, and WinAC controllers via MPI/PROFIBUS, configurable through STEP 7 (TIA Portal).

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Application Scenarios

On a high-speed automotive body-shop press line, operators wear thick protective gloves and work in a semi-washdown environment where a glass-faced HMI would be both vulnerable and impractical. The control cabinet is mounted 20 meters away from the press station, and running 32 discrete wires for start/stop/jog/acknowledgment plus status lamps back to the main S7-1500 rack would mean a costly cable bundle and additional remote I/O blocks. By installing the 6AV3688-3ED13-0AX0 directly at the operator station and connecting it via a single PROFIBUS DP12 drop cable, the plant eliminated the extra I/O slice, gained IP65 front protection against coolant splash, and gave operators tactile, glove-friendly short-stroke keys with bi-color LED feedback. The 6AV3688-3ED13-0AX0 absorbed all 16 DI (e-stop chains, mode selector, foot pedal) and 16 DO (pilot lamps, stack-light segments, audible buzzer relay) locally, reducing cabinet footprint and commissioning time by nearly 30%.

h2 Parameter

Main Parameters	Value/Description
Product Model	6AV3688-3ED13-0AX0
Manufacturer	Siemens AG (SIMATIC HMI)
Product Category	Push Button Panel / Operator Panel (PP17-II)
Control Elements	32 short-stroke keys + 32 surface LEDs (bi-color red/green)
Integrated I/O	16 DI / 16 DO terminals, 24 V DC, short-circuit protected
Communication	PROFIBUS DP12 / MPI
Supply Voltage	18–30 V DC (rated 24 V DC)
Protection Rating	IP65 front / IP20 rear
Housing	Aluminum front, 240 × 204 × 53 mm (W×H×D)
Mounting Cutout	226 × 190 mm, vertical front mounting
Key Life	1,500,000 switching cycles
Operating Temp.	0 °C to +55 °C
Configuration	STEP 7 Basic / Professional (TIA Portal); supports S7-1200/1500/300/400, WinAC

h2 Technical Principles and Innovative Values

Innovation Point 1: Integrated DI/DO Terminals Behind a PROFIBUS Faceplate. Unlike a conventional pendant that only sends button states over Fieldbus, the 6AV3688-3ED13-0AX0 carries its own 16 DI + 16 DO terminal strip on the back. This means the panel doubles as a miniature remote I/O node — the PROFIBUS DP12 master sees the button states and drives the LED/outputs through the same cyclic telegram, eliminating a separate ET 200 block for small-machine applications.

Innovation Point 2: Glove-Optimized Short-Stroke Keys with 1.5M Cycle Rating. The 32 keys use a short-travel tactile design with a rated life of 1.5 million switching cycles — far exceeding typical membrane panels. The actuation force and travel are tuned for gloved operation in metalworking, stamping, and material-handling cells, solving the “fat-finger / false-trigger” pain point of capacitive touch HMIs on the shop floor.

Innovation Point 3: Native TIA Portal Integration Without Extra GSD Effort. Because the 6AV3688-3ED13-0AX0 is a Siemens-first device, it appears directly in the TIA Portal hardware catalog for S7-1200/1500 projects. The DI/DO mapping is drag-and-drop, and the LED illumination logic can be tied to PLC tags without custom scripting — a measurable time-saver during commissioning compared to third-party button stations requiring GSD file juggling.

h2 Application Cases and Industry Value

In a Central European packaging OEM’s rotary filler line, space inside the stainless enclosures was at a premium, and the end customer demanded IP65-rated local controls at three stations along the conveyor. The OEM originally specified a compact touch HMI plus a separate ET 200 remote I/O slice per station — a bill-of-material that added ~€600 per station and required three PROFIBUS nodes. Switching to the Siemens 6AV3688-3ED13-0AX0 collapsed the BOM: the panel delivered the operator buttons, status LEDs, and the 16 DI/16 DO the station needed, all hanging off one PROFIBUS DP12 drop. Commissioning time dropped from 6 hours to 2.5 hours per station because the TIA Portal auto-detected the PP17-II and mapped the I/O symbols directly. Over a 12-station line, the OEM saved roughly €4,200 in hardware and 42 man-hours in startup — feedback that made the 6AV3688-3ED13-0AX0 the default pendant for all subsequent filler SKUs.